Pyrite mega-analysis reveals modes of anoxia through geological time

Emmings, Joseph F.; Poulton, Simon W.; Walsh, Joanna; Leeming, Kathryn A.; Ross, Ian; Peters, Shanan E.. 2022 Pyrite mega-analysis reveals modes of anoxia through geological time. Science Advances, 8 (11).

Before downloading, please read NORA policies.
Text (Open Access Paper)
sciadv.abj5687.pdf - Published Version
Available under License Creative Commons Attribution 4.0.

Download (5MB) | Preview


The redox structure of the water column in anoxic basins through geological time remains poorly resolved despite its importance to biological evolution/extinction and biogeochemical cycling. Here, we provide a temporal record of bottom and pore water redox conditions by analyzing the temporal distribution and chemistry of sedimentary pyrite. We combine machine-reading techniques, applied over a large library of published literature, with statistical analysis of element concentrations in databases of sedimentary pyrite and bulk sedimentary rocks to generate a scaled analysis spanning the majority of Earth’s history. This analysis delineates the prevalent anoxic basin states from the Archaean to present day, which are associated with diagnostic combinations of five types of syngenetic pyrite. The underlying driver(s) for the pyrite types are unresolved but plausibly includes the ambient seawater inventory, precipitation kinetics, and the (co)location of organic matter degradation coupled to sulfate reduction, iron (oxyhydr)oxide dissolution, and pyrite precipitation.

Item Type: Publication - Article
Digital Object Identifier (DOI):
ISSN: 2375-2548
Date made live: 25 Mar 2022 13:59 +0 (UTC)

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...